Wattpad's tag system is trash so I'm warning now that this story on Ao3 now has the tags "Mind Manipulation" and "Manipulative Relationships" as part of it.

(It probably doesn't come as a surprise to anyone seeing how "Unreliable Narrator" is there too,  but I wanted to make it official)

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It took him only a couple of days to decide that he needed to start exploring his new home outside the darkness of the Abyss, as comforting as the environment was, having hundreds of new older and younger siblings who couldn't seem to decide between giving him his space to adjust and drowning him in hugs and games, their new Father did what he could to keep them in line without resorting to imposing his will through the Hive Mind.

And that was probably the hardest thing to swallow, the Hive Mind, knowing that their Old Mother could have imposed her will on them and they would never know, he wasn't sure how the others felt about it, if any of them resented that. The lack of autonomy was an option that their parents always had, even if they did not use it, the possibility would always be there from now on.

(But Pa made them aware of it, Ma kept it a secret, or made it something so unimportant that they never thought twice about it if she ever mentioned it).

So yes, he needed to get out of the darkness for a while, he grabbed one of the Older Vessels and left there through one of the tunnels, the eyes of his Father and dozens of new siblings and familiar brothers watching him leave without trying to stop him, and he didn't know if it was because he has someone with him, because they understand that he needs time alone... or because they and he know that he will return to the warmth of the darkness sooner rather than later, to hell with any doubts and possible fears that he now lives in the back his mind.

.

.

.

After a few hours through tunnels, and a conversation with his quasi-hostage, Kill- Mellow had come to a couple of interesting conclusions about his new home.

This was like being back in the Underground in the best and worst way possible.

If what the new Pa and his siblings had said when they explained a little about the place after waking up was true, this entire kingdom is underground, not because of any war, not even for safety, simply because it was more comfortable for them. The idea was strange to him, living underground had always been something negative for him, the Monster race for centuries had tried to escape from a cave and his new race dug deeper into one every day.

Part of him didn't want to accept that the place where he would live from now on was basically another Underground, a place that contained his best and worst memories.

Years of being a beloved member of his community, the lazy -apathetic- but fun Skeleton Brother, half of a duo popular throughout all of Snowdin, the last obstacle against the Human when they decided that Genocide was the only Route they wanted to take.

The entire Resets with Chara's voice trying to convince him to unite their Souls in an attempt to feel something again, to leave apathy aside and feel emotion again, to stop the senseless killing.

Hours of pain when he finally gave in to temptation.

Months, Reset after Reset, of waking up with both Souls united, both minds slowly but surely uniting too, to the point that he is not sure which part of him is Chara and which is Sans anymore, waking up and having to face blurry friends and acquaintances seeing him now as scum on the earth for having his Soul fused to a human's.

Selfish, a traitor to his race, how dare he deny them freedom by taking a Soul for himself?

It was as if they didn't recognize who they were in front of, all the years of knowing each other were worthless, Sans was a traitor and nothing was going to change that in their minds, explaining about the Resets only made him look like a crazy person in most of his attempts, sometimes it was good, sometimes it just caused him more pain, only 3 beings in the Underground knew about them, one was him and the other 2 would never help him.

Overall, the disappointment of Papyrus, and his inaction, was worse than any hatred, becoming the first being that his little brother no longer believed in when not even the Human had achieved that, even in their worst and most cruel Routes.

His old apathy had turned into despair and his despair soon turned into anger, before his old Mother found him, he had resigned himself and fallen on the same path as the Human, killing everyone Reset after Reset, he wasn't Chara, he wasn't Sans.

He was Killer and he carried that name with pride for all the years that followed, he stained his knife with blood and dust in the name of his Mother and for the protection of his brothers, he was part of the most feared and hated group in the Multiverse, he never had reasons to think again about his old Universe and who used to be his little brother.

And now he was Mellow, son of the most powerful being in the Universe, now he lived in a kingdom where no one who did not have a death wish would dare harm him, his brothers were safe, he was safe and would never see his old Universe again or who used to be his brother.

The last time he saw him was a few days before the Ambush, a moment of weakness, a moment of shame that he never wanted his brothers to know about and that he would happily take to the grave if dying was even possible for them.

(His Pa probably knows, he saw his memories, but he hasn't mentioned it and Mellow doesn't plan to break the beautiful illusion of having secrets for himself).

Maybe it was an hour, maybe it was more, but his trip to Undertale Copy 45, to Killertale, was something he needed even if he didn't realize it at the time.

One last time to be Sans, to be Chara, to tour the caves that were once their home, the Universe had been living on a Perfect Pacifist Route for some years now, the Underground was empty, and everyone had moved away to the Surface.

The Ruins remained almost the same, only neglected and with golden flowers growing everywhere, a small sculpture of a pie was in front of the door that used to be Chara's room and outside the door to the Ruins.

His old guard post... was covered with flowers of all kinds, plastic, eternal, the cold will never wither them and they almost looked like a memorial for a-

Oh.

He had forgotten.

For him, the Universe never stopped being his friends, neighbors, and brother believing that he was a traitor, of him breaking and then killing them all.

For them, still trapped in an endless cycle of repeating the same month of their lives over and over, Sans had disappeared from one day to the next, the comedian of 1 HP, they probably believed him dead, because for them there was no other explanation for him not return home to his brother.

(Dog food, a ketchup bottle with Grillby's logo, and Lesser God's favorite toy where amount the flowers).

It was a strange concept, they remembered Sans with affection and sadness, and Killer remembered them with pain and anger. The house he once shared with Papyrus looked the same until he dared to enter and a similar scene was in front of the door to his room, but this time there were dozens of post-it notes on the door in flower place

He did not dare to read any of them, it was enough to recognize the handwriting in them.

('THE COOLEST OLDER BROTHER')

His telescope in Waterfall was still there, a light layer of dust covering it, but it looked well cared for for the time it probably should have been there, more flowers were there.

But these were Echo Flowers.

He passed them as fast as he could.

(Undyne's voice said "He was lazy, but he never missed a single day at his job... I hate to admit that I will miss his terrible jokes, even if just for Papyrus's reaction to them").

Chara found an umbrella on the ground and placed it over the ancient statue of Waterfall, the one that once represented their brother and them, the dead children of the King, the old music box began to play, and not for the first time they regretted the choice to fuse their Soul with the Comedian.

In Hotland there were fewer flowers, but more painted rocks. Sans refused to enter the laboratory.

The MTT Hotel, the Nucleus and the Capital had not changed other than looking abandoned, in the Final Hallway there was another pie sculpture at the end of it, this time larger and with a small mallet, like the one the judges in the human books used.

Heh.

And finally, the exit of the Underground.

(Out of their memories, his sibling led them away from the crowd who were looking with curiosity and concern at the Strange Vessel that had started crying out of nowhere.)

Outside the entrance, on the slope outside the mountain where he could see New New Home, because, of course, that was the name of the city, there was a grave overlooking the horizon.

Sans Skeleton

19XX - 20XX

Royal Judge

Dear brother, friend, and neighbor

He always loved the stars.

He looked at the grave of who he used to be and felt peace.

The part of him that used to be Sans felt loved, what difference did it make if the only reason they remembered him fondly was because of a Reset?

It was late, it was a new moon night and footsteps approached from behind until they stopped and something fell to the ground.

"S-sans?" Papyrus's voice, his little brother, sounded so fragile, so hopeful, that for a second he needed to turn around, run into his arms, take advantage of the lack of light, and pretend that, for a moment, he was just Sans again.

...

But Killer wasn't Papyrus's brother, he wasn't Sans, he wasn't Chara, and he couldn't destroy everyone's love for the memory of their Sans by turning around and showing even a glimpse of the monster he had become.

Killer closed his eyes and teleported away from there, returning home and days later he entered a battlefield more ready than ever to leave the Multiverse, any trace of Sans and Chara in his being finally at peace.

Mellow opened his eyes to a new Universe, his new siblings next to him holding one of his hands gently but firmly, in front of them was an immense lake, they had probably been there for hours.

"I'm sorry you had to see that." He was embarrassed, all he had done all day was pull them around and now they had to put up with him breaking down over memories that weren't even bad.

"There is no need to apologize, memories can be a lot to digest, and all of us sometimes get lost in them." Was their simple response, sky's blue, they're void, crying over memories is okay.

So he would do that, today Mellow wanted to feel miserable over his memories, he wanted to cry and scream for Sans, who lost everything just because he wanted to feel something more than apathy, he wanted to cry for Chara, who tried to help him in their twisted way, for both Souls who came together in an attempt to stop a murderer and only created another.

He wanted to scream at how unfair it was to realize that there was a reason why he hadn't processed those memories before today, why the unconditional love he had for his Ma was fading more and more every day.

(Void Gods were possessive and selfish that way).

His sibling, Geode, held his hand the entire time, maybe they understood his feelings, maybe not, but they never stopped being a continuous presence at his side, not letting him hurt himself, but not stopping him from attacking the environment around them.

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Sans, Dust, Ash, whatever his name was now, emerged from the Abyss with his old jacket, the one that witnessed all his sins, and a goal in mind. He left through the door, while most of his brothers explored the tunnels, the castle next door was the only one Ash wanted to go to at the moment.

It hadn't been difficult to get the old jacket back, his Papa already seemed to expect him to ask for it back once the euphoria of being safe subsided.

The oldest of all his new siblings, Hallow, followed close behind, not seeming inclined to stop him, but he could practically feel the confusion coming off of them, why Ash would want to talk to the King of the place, especially with how 'vocal' he Ghost was regarding his previous actions.

And that was exactly why Ash wanted to see this... Pale King

Another being as despicable as him.

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Hello :D

Sorry for the long wait, I have no excuse outside no having inspiration for it, it will happen again

The next chapter is gonna be from the POV of the Pale King, the dude who sacrificed all his children for the 'greater good' and is gonna talk with the skeleton who killed all his race for the 'greater good'. That will be fun